Where do centrifugal pumps build up pressure?

Centrifugal pumps build up pressure primarily in the volute. The volute is a specially designed casing surrounding the impeller that helps convert the kinetic energy of the fluid, created by the spinning impeller, into pressure energy. As the impeller spins, it accelerates the water outward due to centrifugal force, causing it to move into the volute. The shape of the volute gradually increases in cross-sectional area, which helps to slow down the fluid velocity and convert that kinetic energy into pressure.

This process is essential in ensuring that the pumped fluid is directed effectively within the system, allowing for efficient movement of water through hoses and to the desired discharge point. The design and functionality of the volute make it a critical component in achieving the required pressure for various firefighting operations.